Drop 'ghcup compile cabal'

Upstream has discontinued the old bootstrap shell script.
The new python shell script doesn't work like the old one
and is only useful for bootstrapping to a new architecture.

If you miss this feature, consider running:
  cabal install cabal-install

with the appropriate GHC version set (this might need some
experimenting).

This also fixes #64

app/ghcup/Main.hs

@@ -148,7 +148,6 @@ data RmOptions = RmOptions
 
 
 data CompileCommand = CompileGHC GHCCompileOptions
-                    | CompileCabal CabalCompileOptions
 
 
 data GHCCompileOptions = GHCCompileOptions
@@ -612,16 +611,6 @@ compileP = subparser
             )
           )
       )
-  <> command
-       "cabal"
-       (   CompileCabal
-       <$> (info
-             (cabalCompileOpts <**> helper)
-             (  progDesc "Compile Cabal from source"
-             <> footerDoc (Just $ text compileCabalFooter)
-             )
-           )
-       )
   )
  where
   compileFooter = [s|Discussion:
@@ -642,13 +631,6 @@ Examples:
   ghcup compile ghc -j 4 -v 8.4.2 -b /usr/bin/ghc-8.2.2
   # build cross compiler
   ghcup compile ghc -j 4 -v 8.4.2 -b 8.2.2 -x armv7-unknown-linux-gnueabihf --config $(pwd)/build.mk -- --enable-unregisterised|]
-  compileCabalFooter = [i|Discussion:
-  Compiles and installs the specified Cabal version
-  into "~/.ghcup/bin".
-
-Examples:
-  ghcup compile cabal -j 4 -v 3.2.0.0 -b 8.6.5
-  ghcup compile cabal -j 4 -v 3.2.0.0 -b /usr/bin/ghc-8.6.5|]
 
 
 ghcCompileOpts :: Parser GHCCompileOptions
@@ -1060,26 +1042,6 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
 #endif
                       ]
 
-          let runCompileCabal =
-                runLogger
-                  . flip runReaderT settings
-                  . runResourceT
-                  . runE
-                    @'[ AlreadyInstalled
-                      , BuildFailed
-                      , CopyError
-                      , DigestError
-                      , DownloadFailed
-                      , NoDownload
-                      , NotInstalled
-                      , PatchFailed
-                      , UnknownArchive
-                      , TarDirDoesNotExist
-#if !defined(TAR)
-                      , ArchiveResult
-#endif
-                      ]
-
           let runUpgrade =
                 runLogger
                   . flip runReaderT settings
@@ -1385,28 +1347,6 @@ Make sure to clean up #{tmpdir} afterwards.|])
                         runLogger ($(logError) [i|#{e}|])
                         pure $ ExitFailure 9
 
-            Compile (CompileCabal CabalCompileOptions {..}) ->
-              (runCompileCabal $ do
-                  liftE $ compileCabal dls targetVer bootstrapGhc jobs patchDir pfreq
-                )
-                >>= \case
-                      VRight _ -> do
-                        runLogger
-                          ($(logInfo)
-                            "Cabal successfully compiled and installed"
-                          )
-                        pure ExitSuccess
-                      VLeft (V (BuildFailed tmpdir e)) -> do
-                        case keepDirs of
-                          Never -> runLogger ($(logError) [i|Build failed with #{e}|])
-                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at #{logsDir} and the build directory #{tmpdir} for more clues.
-Make sure to clean up #{tmpdir} afterwards.|])
-                        pure $ ExitFailure 10
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 10
-
             Upgrade (uOpts) force -> do
               target <- case uOpts of
                 UpgradeInplace -> do

ghcup-0.0.2.yaml

@@ -1197,10 +1197,6 @@ ghcupDownloads:
     2.4.1.0:
       viTags: []
       viChangeLog: https://downloads.haskell.org/~cabal/cabal-install-2.4.1.0/changelog
-      viSourceDL:
-        dlUri: https://github.com/haskell/cabal/archive/cabal-install-v2.4.1.0.tar.gz
-        dlSubdir: cabal-cabal-install-v2.4.1.0/cabal-install
-        dlHash: 61eb64a5addafca026aff9277291f4643fe07e83886f76d059d42c734fed829c
       viArch:
         A_64:
           Linux_Alpine:
@@ -1232,10 +1228,6 @@ ghcupDownloads:
     3.0.0.0:
       viTags: []
       viChangeLog: https://downloads.haskell.org/~cabal/cabal-install-3.0.0.0/changelog
-      viSourceDL:
-        dlUri: https://github.com/haskell/cabal/archive/cabal-install-v3.0.0.0.tar.gz
-        dlSubdir: cabal-cabal-install-v3.0.0.0/cabal-install
-        dlHash: c0b26817a7b7c2907e45cb38235ce1157e732211880f62e92eaff4066202e674
       viArch:
         A_64:
           Linux_Alpine:
@@ -1268,10 +1260,6 @@ ghcupDownloads:
       - Recommended
       - Latest
       viChangeLog: https://downloads.haskell.org/~cabal/cabal-install-3.2.0.0/changelog
-      viSourceDL:
-        dlUri: https://github.com/haskell/cabal/archive/cabal-install-v3.2.0.0.tar.gz
-        dlSubdir: cabal-cabal-install-v3.2.0.0/cabal-install
-        dlHash: 77202358bdf0b481c09326268ce18880df14194c5aaa840f99510bdd1a124b75
       viArch:
         A_64:
           Linux_Alpine:

lib/GHCup.hs

@@ -1261,122 +1261,6 @@ Stage1Only = YES|]
 
 
 
--- | Compile a cabal from source. This behaves wrt symlinks and installation
--- the same as 'installCabalBin'.
-compileCabal :: ( MonadReader Settings m
-                , MonadResource m
-                , MonadMask m
-                , MonadLogger m
-                , MonadIO m
-                , MonadFail m
-                )
-             => GHCupDownloads
-             -> Version                    -- ^ version to install
-             -> Either Version (Path Abs)  -- ^ version to bootstrap with
-             -> Maybe Int
-             -> Maybe (Path Abs)
-             -> PlatformRequest
-             -> Excepts
-                  '[ AlreadyInstalled
-                   , BuildFailed
-                   , CopyError
-                   , DigestError
-                   , DownloadFailed
-                   , NoDownload
-                   , NotInstalled
-                   , PatchFailed
-                   , UnknownArchive
-                   , TarDirDoesNotExist
-#if !defined(TAR)
-                   , ArchiveResult
-#endif
-                   ]
-                  m
-                  ()
-compileCabal dls tver bghc jobs patchdir PlatformRequest{..} = do
-  lift $ $(logDebug) [i|Requested to compile: #{tver} with ghc-#{bghc}|]
-
-  Settings {dirs = Dirs {..}} <- lift ask
-
-  whenM
-      (lift (cabalInstalled tver) >>= \a -> liftIO $
-        handleIO (\_ -> pure False)
-          $ fmap (\x -> a && isSymbolicLink x)
-          -- ignore when the installation is a legacy cabal (binary, not symlink)
-          $ getSymbolicLinkStatus (toFilePath (binDir </> [rel|cabal|]))
-      )
-    $ (throwE $ AlreadyInstalled Cabal tver)
-
-  -- download source tarball
-  dlInfo <- preview (ix Cabal % ix tver % viSourceDL % _Just) dls ?? NoDownload
-  dl <- liftE $ downloadCached dlInfo Nothing
-
-  -- unpack
-  tmpUnpack <- lift mkGhcupTmpDir
-  liftE $ unpackToDir tmpUnpack dl
-  void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
-
-  workdir <- maybe (pure tmpUnpack) (liftE . intoSubdir tmpUnpack) (view dlSubdir dlInfo)
-
-  cbin         <- liftE $ runBuildAction tmpUnpack Nothing (compile workdir)
-
-  destFileName <- lift $ parseRel ("cabal-" <> verToBS tver)
-  handleIO (throwE . CopyError . show) $ liftIO $ copyFile
-    cbin
-    (binDir </> destFileName)
-    Overwrite
-
-  -- create symlink if this is the latest version
-  cVers <- lift $ fmap rights $ getInstalledCabals
-  let lInstCabal = headMay . reverse . sort $ cVers
-  when (maybe True (tver >=) lInstCabal) $ liftE $ setCabal tver
-
-  pure ()
-
- where
-  compile :: (MonadReader Settings m, MonadThrow m, MonadLogger m, MonadIO m, MonadResource m)
-          => Path Abs
-          -> Excepts '[ProcessError , PatchFailed] m (Path Abs)
-  compile workdir = do
-    lift $ $(logInfo) [i|Building (this may take a while)...|]
-
-    forM_ patchdir $ \dir -> liftE $ applyPatches dir workdir
-
-    ghcEnv <- case bghc of
-      Right path -> do
-        -- recover the version from /foo/ghc-6.5.4
-        bn <- basename path
-        let dn  = toFilePath $ dirname path
-        let ver = snd . B.break (== _hyphen) . toFilePath $ bn
-
-        pure
-          [ ("GHC"    , toFilePath path)
-          , ("GHC_PKG", dn <> "/" <> "ghc-pkg" <> ver)
-          , ("HADDOCK", dn <> "/" <> "haddock" <> ver)
-          ]
-      Left bver -> do
-        let v' = verToBS bver
-        pure
-          [ ("GHC"    , "ghc-" <> v')
-          , ("GHC_PKG", "ghc-pkg-" <> v')
-          , ("HADDOCK", "haddock-" <> v')
-          ]
-
-    tmp <- lift withGHCupTmpDir
-    liftIO $ createDirRecursive' (tmp </> [rel|bin|])
-    newEnv <- lift $ addToCurrentEnv (("PREFIX", toFilePath tmp) : ghcEnv)
-    lift $ $(logDebug) [i|Environment: #{newEnv}|]
-
-    lEM $ execLogged "./bootstrap.sh"
-                              False
-                              (maybe [] (\j -> ["-j", fS (show j)]) jobs)
-                              [rel|cabal-bootstrap|]
-                              (Just workdir)
-                              (Just newEnv)
-    pure $ (tmp </> [rel|bin/cabal|])
-
-
-
 
     ---------------------
     --[ Upgrade GHCup ]--